LT1113_15 Datasheet, PDF (14/16 Pages) Linear Technology – Dual Low Noise, Precision, JFET Input Op Amp

LT1113
TYPICAL APPLICATI
S
Low Noise Light Sensor with DC Servo
C1
2pF
R1
1M
2–
D2
1N914
1
1/2 LT1113
3+
C2
0.022µF
C_D
2N3904
+V
R2
D1
1N914
R3
1k
7
8
6
100k
1/2 LT1113
5
HAMAMATSU
S1336-5BK
R5
1k
V^–
R4
4
1k
–V
R2C2 > C1R1
C_D = PARASITIC PHOTODIODE CAPACITANCE
V_O = 100mV/µWATT FOR 200nm WAVE LENGTH
330mV/µWATT FOR 633nm WAVE LENGTH
OUTPUT
1113 • TA05
10Hz Fourth Order Chebyshev Lowpass Filter (0.01dB Ripple)
R1
237k
V_IN
R2
237k
C1
33nF
R3
249k
C2
100nF
15V
2– 8
1
1/2 LT1113
3+
4
–15V
R5
154k
C3
10nF
R4
R6
154k
249k ₆ –
C4
330nF
7
1/2 LT1113
5+
V_OUT
TYPICAL OFFSET ≈ 0.8mV
1% TOLERANCES
FOR V_IN = 10V_P-P, V_OUT = –121dB AT f > 330Hz
= – 6dB AT f = 16.3Hz
LOWER RESISTOR VALUES WILL RESULT IN LOWER THERMAL NOISE AND LARGER CAPACITORS
1113 • TA06
1113fb
14